Phonograph.



M. KERN. PHoNoeRAPH. y APPLICATION FILED DEO.21, 1905.

907,814. Patented 1m29, 1908.

nucnfoz' y To all'fwhom it 'may conc'emr .UNITED srATnsrnirnNr orIrion.l

MoRRIs KEN, or PHILADLPHIA, PENNSYLVANIA.,

' PHoNoGRArH.

i Speccation Aont Letters Patent.

Patented Dee. 29, 1908'.P

Application led Qecember 21, 1905. Serial No. 292,679.

Be it known that I, MORRIS KERN, a citizen of the United States, residing -in the city and county of Ihiladelphia, State of Penn,- sylvania, have invented anew and use ul Improvement in Phonographs, of which the` following is a specification.

My invention relates 4to phonographs and consists of an artiiliciall extension of a portion ofthe sound conveyer between the repro- .l

ducer andy the horn support, as set forth in" the claims. '1 'I Itfurther consists in means for'controlla- 'bly admitting air to the side of the diaphragm' -opposite to the' admission tube, as set forth in the claims.

It further consists of novel details of con-f. struction, all as will` be hereinafter fully set forth. 1

Figure. 1 represents a -sidefelevation -of van v attachment to a phonograph, embodying my invention. Fig. 2 represents a sectional view' on line -x, Fig; 1. Fig. 3 represents a sectional view on line yf-y, Fig.' 1. Fig. 4 represents aside elevation of the reproducing portion with one side thereof removed. Fig.

' 5 represents a plan view ofy a portion of.v the rotatable thereon, said thimblebein device on an enlarged scale. f Similar letters of reference indicate correq-v sponding parts in the figures. Referring to the drawings: 1 designates an arm or bracket having the late 2 thereon which may be secured to the ox of the pho/,- nograph orto 'a suitable support. Carried by the bracket 1 isa `collar 3 to which is se cured the sleeve 4.

5 designates a thimble which has a 'ortion projecting into the sleeve and w 'ch is mounts. ed on the pivotal point 7' carrie bythe `bracket 1 and being'provided with an-extension 8. Connected with the extension ,8, by-

-means of a screw 9, is a chamber 10, the same formed spirally,

having. an o ening' extending transversely" therewith an 'communicated with the inte- -"rior of the thimble 5f. A plate `11 partly closes the outer end of the opening and a valve 12 1s connectedwith said plate and serves to rell'ate or control the. outlet lopening, as will e hereinafter described, (Jom-A munlcating with the interior ofthe chamber 10 is a pipe 13 which at a suitable-.point .is as best understood: from Figs. 1 and 2, it'beingfnoted that said spirals arev situated substantially ad'acent eac other in order to occupy assma aspace as .outer end of said pipe i munication with the outside air.

hl held in said block -21.

waves to the horn which I consider the point side of the diaphragm from a lthe sound from .tion 15 and the diaphragm 24 designatesv the horn possible. have been shown'ina spiral it will be apparent that any form may be used which will While theconvolutions of the tube I mounted on the plate 16 and can. move l thereon.

The vsound box, tube 13 and chamber 10 constitute a casing or passage way, closed to .the outside air, except as -pro'vid'ed for by my opening, throughout' its entire length from the diaphragm or point of origin of the sound I find an these of deliveryof the sound waves. opening to the outside -air between oints of origin and delivery quite desirable or some purposes and at the same time-am able to close It when I wish to prevent'com- Theopening upon the delivery side ofthe diaphragm at 12 is to be distinguished from that upon theopposite side of said diaphragm at 17, the opening of which changes the space uponthat closed and, under certain clrcumstances, a damping chamber to an open chamber permittin `additional vibration of the diaphragm an giving an exit for the sound from that side of the diaphragm, this portion of the sound, however, notbeing s own-asme aphoned, In so far as it permits more free vi ration of the diaphragm this increases the volume of the delivery side of the diaphragm which is in this case, andusually,

' megaphoned.

` Within the chamber are the two rubber tubesg 19 between which 'is held the diaf phragm 20. i f

The needle holderconsists of the lblock 21 carried by the arm 22, the latter being pivotally mounted` with respect to the body lpor'- 20, the need e or stvlus 23 being removably and adjustably ros holder which `is f `horn holder 24 25 lng the openings 17, in the plate 16, I can still suitable shape and ment is also through the pipe 13and tions, finally entering the lnstrnment is which is rotatably mounted upon the sleeve 4.

heoperation of the device Will be readily seen. The bracket 1 is iirmly secured to the box' of tlvphonograph or to any suitable point that may be desired, and by reason of the construction of the horn receptacle on its support itv can be turned in any direction. The stylus support which consists of the pipe 13 in the present instance, can also be rotated in any direction, as will be apparent, since the same rests upon the ivot 7 and is supported by the sleeve 4 W ich is firmly he d in the collar 3. Longitudinal movepermitted to the stylus in order that the same can be raised and lowered,l this movement carrying with it the pipe 13 and its convolutions. Whenl the parts are imposition and the stylus is operating the sound is transmitted from the vibrator 20 its various convoluthe interior ofthe thimble 5 and being discharged through the Whichmay or may not .contain a horn. By reason of this passage through this pipe 13, the sound-is softened and the scratching and rasping tones which ordinarily occur 1n .ay phonograph are enobviated, the result being a softand melodious tone. In order to adjust the amount. of sound 'I have provided valve 12 controlling the opening into the thimble 5 and by adjusting thisvalve, more or less air-from the outside is permitted to enter and be mingled with the sounds from the phonograph, .the eiect being that the sound from not nearly so great and when the opening or-valve is entirely closed, the sound is still softer.' In addition, by adjusting theivalve 18, thus opening or clos-` further adjust the sound froml the instru- `lm`ent, the ei'lect ofwhich often occurs, that it is not is evident, as it desired to` have .the sound from the instrument too loud as it maybe annoying. By reason oi my construction ,I can regulate this as desired .Where I refer in my claims to a coil or to coiled f-tubes or other passages I wish to be understood as includingv Within the term coil or coiled spirals withinthe same or approximately the same planes, helices and any plurality-'of return ends or loops orl even a single ,such loo whose pur ose 1s the lengthening of the pat of travel o the-sound Waves or modification of the waves.

It will be .evident that various/,changes may bel made by those skilled in' the art, which may coine Within thev scope of lmy inlvention` and I donot therefore desire to be limited in every instance to the exact construction herein shown and described.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent, is: 'i i 1. In a device of the character described, a dia hragm, a horn holder, and a spirally coilled casing therebetween.

2. In a device ofthe character described, a needle, a reproducer suitably sup orted, said reproducer having an opening tlhereinto, a valve adjustably contro ling said o ening, a tube for transmittin in communication wit said tube and having an opening therein and a valve controlling said o ening.

3. n a device of the character described, a stylus, a diaphragm, a transmission tube and `means for controllably admitting air to the side of the diaphragm opposite to the admission tube in quantity as desired.'

4. In a device ofthe character described, a diaphragm, a horn holder and a coiled casing between the diaphragm and the horn holder to increase the distance traversed by the vsound between these two points.

. 5. A talkin machine comprising a reproducer, a fixed Iiorn support, and a sound conveyer mountedupon said sup ort, a portion of said sound conveyer extending from said `reproducer toward said support, and another portion of said sound conveyer being rigid and artiiicially lengthened between said former portion and said support.

` '6.l A talkin machine comprising a reproducer, a fixed Iiorn support, and a sound conveyer mounted upon said support, a portion of said sound conveyer extending from said reproducer toward said support, and another portion of said sound conveyer being pivotally-movable and artificially'lengthened betweenrsaid former portion andY said su port. 7 Ina device ofthe character described, a needle, a diaphragm and a tube for transmitting the sound therefrom, said tube having a plurality of convolutions therein, through which the sound waves must pass.

8. In adevice of thelcharacter described, a dia hragm, a horn' holder, and a spirally coilled casing therebetween, the coils of which lie in the same plane.

9. In a device of the characterl described, a

diaphr gm, a horn holder,'and an artificially extended passagebetween4 the horn holder and dia hragm 'com rising-'a' plurality 0f turns of ike general c aracter.

l MORRIS KEEN. Witnesses: WM. CANER WIEDERSHEIM,

C. D. MCVAY. Y

the sound, a c iamber 

